As if this were news...
I remember in the 70s my earth science professor telling us that agriculture had developed during a period of unusually stable climate, and that, some day, the climate would start shifting back to "normal," that is, less stable and suitable for agriculture.
Looks like some day has arrived.
It's only political inertia that has cast any doubt at all on the observations that global climate has been shifting at an increasing rate over the past 12,000 years. I observed it and an island in the Bering Strait, standing in the surf where archaeologist had been digging on dry land only thirty years before. I watched long lines of fence posts toppling over near Fairbanks, as melting permafrost shifted and heaved the ground. A huge hole appeared in my front yard, requiring several truck loads of sewage sludge to fill the space left over by melted permafrost.
It's has been abundantly obvious that the planet is warming and subsequent changes are now and will continue to affect human society in increasingly dramatic disasters.
It's Nature's way.